Earlier quoted context omitted.
An extra port is not inconvenient - you just won't use it. A missing port is SUPER inconvenient. Can't tell you how annoying it is to require a USB-A dongle or adapter, same with HDMI.
The extra port competes with USB-C. If Apple wants to make USB-C more valuable to users, they must ensure companies make more products for it and, therefore, remove such redundant ports. I have an HDMI monitor connected to my MacBook via a USB-C to HDMI/USB dongle, which also charges the computer, keyboard and trackpad, and another another via a UDB-C to DisplayPort cable. I've been using my SDcard based camera less…
But some people live in apartments and some people park their car most of the day at work.
This is a way of saying - not everyone parks their computer at home with a nice reliable setup completely under their control.
Some people - for many reasons - have to use setups that are out of their control. Those people will be second-class citizens, carrying an assortment of duct-tape with them (dongles).